diff options
Diffstat (limited to 'sysdeps/x86/sysdep.h')
| -rw-r--r-- | sysdeps/x86/sysdep.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/sysdeps/x86/sysdep.h b/sysdeps/x86/sysdep.h index c3c73e7..b8e963b 100644 --- a/sysdeps/x86/sysdep.h +++ b/sysdeps/x86/sysdep.h @@ -183,6 +183,29 @@ #define atom_text_section .section ".text.atom", "ax" +#ifndef DL_STACK_ALIGNMENT +/* Due to GCC bug: + + https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58066 + + __tls_get_addr may be called with 8-byte/4-byte stack alignment. + Although this bug has been fixed in GCC 4.9.4, 5.3 and 6, we can't + assume that stack will be always aligned at 16 bytes. */ +# ifdef __x86_64__ +# define DL_STACK_ALIGNMENT 8 +# define MINIMUM_ALIGNMENT 16 +# else +# define DL_STACK_ALIGNMENT 4 +# endif +#endif + +/* True if _dl_runtime_resolve/_dl_tlsdesc_dynamic should align stack for + STATE_SAVE or align stack to MINIMUM_ALIGNMENT bytes before calling + _dl_fixup/__tls_get_addr. */ +#define DL_RUNTIME_RESOLVE_REALIGN_STACK \ + (STATE_SAVE_ALIGNMENT > DL_STACK_ALIGNMENT \ + || MINIMUM_ALIGNMENT > DL_STACK_ALIGNMENT) + #endif /* __ASSEMBLER__ */ #endif /* _X86_SYSDEP_H */ |